The heartbeat of the oligocene climate system

Palike, H. and Norris, R. D. and Herrle, J. O. and Wilson, P. A. and Coxall, H. K. and Lear, C. H. and Shackleton, N. J. and Tripati, A. K. and Wade, B. S. (2006) The heartbeat of the oligocene climate system. Science, 314 (5807). pp. 1894-1898. DOI

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A 13-million-year continuous record of Oligocene climate from the equatorial Pacific reveals a pronounced “heartbeat” in the global carbon cycle and periodicity of glaciations. This heartbeat consists of 405,000-, 127,000-, and 96,000-year eccentricity cycles and 1.2-million-year obliquity cycles in periodically recurring glacial and carbon cycle events. That climate system response to intricate orbital variations suggests a fundamental interaction of the carbon cycle, solar forcing, and glacial events. Box modeling shows that the interaction of the carbon cycle and solar forcing modulates deep ocean acidity as well as the production and burial of global biomass. The pronounced 405,000-year eccentricity cycle is amplified by the long residence time of carbon in the oceans.

Item Type: Article
Uncontrolled Keywords: 2007 AREP IA53 2006 P
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title: Science
Volume: 314
Page Range: pp. 1894-1898
Identification Number:
Depositing User: Sarah Humbert
Date Deposited: 16 Feb 2009 13:03
Last Modified: 23 Jul 2013 10:08

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